So I am 13 w 4d with fraternal twins and happy. I won't get my next ultra sound till 20 weeks to find out gender. So I was googling on ways to find out gender, ol wives tales, anything of that sort by ultra sound and I came across a couple of theories, the nub theory is the one I saw most accurate guessing results. I kind of dont get it but it doesn't hurt to guess and I would love if other people have me their opinions and occupy myomd a little until I go to dr for gender test. Now in this ultra sound twin a measured 12 w 6 d and heartbeat was 171 and twin b measured 12 w 4 d and heart beat was 184.... Now twin a didn't move too much and it's a decent photo but twin b would not sit still if life depended on it so not too good of picture but I would greatly appreciate if y'all fellow members would just entertain the idea and give me your lucky guess... So what do u say, what is ur guess?